[Webkit-unassigned] [Bug 247695] New: Many memory leaks in the simple Apple JavaScriptCore C usage
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Wed Nov 9 13:31:12 PST 2022
https://bugs.webkit.org/show_bug.cgi?id=247695
Bug ID: 247695
Summary: Many memory leaks in the simple Apple JavaScriptCore C
usage
Product: WebKit
Version: Safari 16
Hardware: Mac (Apple Silicon)
OS: macOS 12
Status: NEW
Severity: Normal
Priority: P2
Component: JavaScriptCore
Assignee: webkit-unassigned at lists.webkit.org
Reporter: sergio_nsk at yahoo.de
The simple create/release code:
#include <JavaScriptCore/JSContextRef.h>
int main() {
auto *global = JSGlobalContextCreate(nullptr);
JSGlobalContextRelease(global);
}
built with clang:
clang++ -std=c++14 -g test.cc -framework JavaScriptCore
and run with the leaks instrumentation:
leaks -atExit -- ./a.out
reports a lot of leaks:
Process 19039 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.
Process: a.out [19039]
Path: /Users/USER/*/a.out
Load Address: 0x1001b4000
Identifier: a.out
Version: 0
Code Type: ARM64
Platform: macOS
Parent Process: leaks [19037]
Date/Time: 2022-11-09 14:29:12.962 -0700
Launch Time: 2022-11-09 14:29:12.435 -0700
OS Version: macOS 12.6 (21G115)
Report Version: 7
Analysis Tool: /Applications/Xcode.app/Contents/Developer/usr/bin/leaks
Analysis Tool Version: Xcode 14.0.1 (14A400)
----
leaks Report Version: 4.0
Process 19039: 1012 nodes malloced for 68 KB
Process 19039: 110 leaks for 4400 total leaked bytes.
110 (4.30K) << TOTAL >>
1 (1.25K) ROOT LEAK: 0x11d820000 [1280]
1 (64 bytes) ROOT LEAK: 0x11d804960 [64]
1 (64 bytes) ROOT LEAK: 0x11d8049a0 [64]
1 (64 bytes) ROOT LEAK: 0x11d8049e0 [64]
1 (64 bytes) ROOT LEAK: 0x11d804a20 [64]
1 (32 bytes) ROOT LEAK: 0x11d804020 [32]
1 (32 bytes) ROOT LEAK: 0x11d804040 [32]
1 (32 bytes) ROOT LEAK: 0x11d804060 [32]
1 (32 bytes) ROOT LEAK: 0x11d804080 [32]
1 (32 bytes) ROOT LEAK: 0x11d8040a0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8040c0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8040e0 [32]
1 (32 bytes) ROOT LEAK: 0x11d804100 [32]
1 (32 bytes) ROOT LEAK: 0x11d804120 [32]
1 (32 bytes) ROOT LEAK: 0x11d804140 [32]
1 (32 bytes) ROOT LEAK: 0x11d804160 [32]
1 (32 bytes) ROOT LEAK: 0x11d804180 [32]
1 (32 bytes) ROOT LEAK: 0x11d8041a0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8041c0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8041e0 [32]
1 (32 bytes) ROOT LEAK: 0x11d804200 [32]
1 (32 bytes) ROOT LEAK: 0x11d804220 [32]
1 (32 bytes) ROOT LEAK: 0x11d804240 [32]
1 (32 bytes) ROOT LEAK: 0x11d804260 [32]
1 (32 bytes) ROOT LEAK: 0x11d804280 [32]
1 (32 bytes) ROOT LEAK: 0x11d8042a0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8042c0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8042e0 [32]
1 (32 bytes) ROOT LEAK: 0x11d804300 [32]
1 (32 bytes) ROOT LEAK: 0x11d804320 [32]
1 (32 bytes) ROOT LEAK: 0x11d804340 [32]
1 (32 bytes) ROOT LEAK: 0x11d804360 [32]
1 (32 bytes) ROOT LEAK: 0x11d804380 [32]
1 (32 bytes) ROOT LEAK: 0x11d8043a0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8043c0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8043e0 [32]
1 (32 bytes) ROOT LEAK: 0x11d804400 [32]
1 (32 bytes) ROOT LEAK: 0x11d804420 [32]
1 (32 bytes) ROOT LEAK: 0x11d804440 [32]
1 (32 bytes) ROOT LEAK: 0x11d804460 [32]
1 (32 bytes) ROOT LEAK: 0x11d804480 [32]
1 (32 bytes) ROOT LEAK: 0x11d8044a0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8044c0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8044e0 [32]
1 (32 bytes) ROOT LEAK: 0x11d804500 [32]
1 (32 bytes) ROOT LEAK: 0x11d804520 [32]
1 (32 bytes) ROOT LEAK: 0x11d804540 [32]
1 (32 bytes) ROOT LEAK: 0x11d804560 [32]
1 (32 bytes) ROOT LEAK: 0x11d804580 [32]
1 (32 bytes) ROOT LEAK: 0x11d8045a0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8045c0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8045e0 [32]
1 (32 bytes) ROOT LEAK: 0x11d804600 [32]
1 (32 bytes) ROOT LEAK: 0x11d804620 [32]
1 (32 bytes) ROOT LEAK: 0x11d804640 [32]
1 (32 bytes) ROOT LEAK: 0x11d804660 [32]
1 (32 bytes) ROOT LEAK: 0x11d804680 [32]
1 (32 bytes) ROOT LEAK: 0x11d8046a0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8046c0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8046e0 [32]
1 (32 bytes) ROOT LEAK: 0x11d804700 [32]
1 (32 bytes) ROOT LEAK: 0x11d804720 [32]
1 (32 bytes) ROOT LEAK: 0x11d804740 [32]
1 (32 bytes) ROOT LEAK: 0x11d804760 [32]
1 (32 bytes) ROOT LEAK: 0x11d804780 [32]
1 (32 bytes) ROOT LEAK: 0x11d8047a0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8047c0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8047e0 [32]
1 (32 bytes) ROOT LEAK: 0x11d804800 [32]
1 (32 bytes) ROOT LEAK: 0x11d804820 [32]
1 (32 bytes) ROOT LEAK: 0x11d804840 [32]
1 (32 bytes) ROOT LEAK: 0x11d804860 [32]
1 (32 bytes) ROOT LEAK: 0x11d804880 [32]
1 (32 bytes) ROOT LEAK: 0x11d8048a0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8048c0 [32]
1 (32 bytes) ROOT LEAK: 0x11d8048e0 [32]
1 (32 bytes) ROOT LEAK: 0x11d804900 [32]
1 (32 bytes) ROOT LEAK: 0x11d804920 [32]
1 (32 bytes) ROOT LEAK: 0x11d804940 [32]
1 (16 bytes) ROOT LEAK: 0x1090040c0 [16]
1 (16 bytes) ROOT LEAK: 0x109004110 [16]
1 (16 bytes) ROOT LEAK: 0x109004140 [16]
1 (16 bytes) ROOT LEAK: 0x109004170 [16]
1 (16 bytes) ROOT LEAK: 0x1090041a0 [16]
1 (16 bytes) ROOT LEAK: 0x1090041d0 [16]
1 (16 bytes) ROOT LEAK: 0x109004200 [16]
1 (16 bytes) ROOT LEAK: 0x109004230 [16]
1 (16 bytes) ROOT LEAK: 0x109004260 [16]
1 (16 bytes) ROOT LEAK: 0x109004290 [16]
1 (16 bytes) ROOT LEAK: 0x1090042c0 [16]
1 (16 bytes) ROOT LEAK: 0x1090042f0 [16]
1 (16 bytes) ROOT LEAK: 0x109004320 [16]
1 (16 bytes) ROOT LEAK: 0x109004350 [16]
1 (16 bytes) ROOT LEAK: 0x109004380 [16]
1 (16 bytes) ROOT LEAK: 0x1090043b0 [16]
1 (16 bytes) ROOT LEAK: 0x1090043e0 [16]
1 (16 bytes) ROOT LEAK: 0x109004410 [16]
1 (16 bytes) ROOT LEAK: 0x109004440 [16]
1 (16 bytes) ROOT LEAK: 0x109004470 [16]
1 (16 bytes) ROOT LEAK: 0x1090044a0 [16]
1 (16 bytes) ROOT LEAK: 0x1090044d0 [16]
1 (16 bytes) ROOT LEAK: 0x109004500 [16]
1 (16 bytes) ROOT LEAK: 0x109004510 [16]
1 (16 bytes) ROOT LEAK: 0x109004520 [16]
1 (16 bytes) ROOT LEAK: 0x109004530 [16]
1 (16 bytes) ROOT LEAK: 0x109004540 [16]
1 (16 bytes) ROOT LEAK: 0x1090045b0 [16]
1 (16 bytes) ROOT LEAK: 0x1090045d0 [16]
1 (16 bytes) ROOT LEAK: <WTF::Detail::CallableWrapper<JSC::VMTraps::SignalSender::initializeSignals()::'lambda'()::operator()() const::'lambda'(WTF::Signal, WTF::SigInfo&, __darwin_arm_thread_state64&), WTF::SignalAction, WTF::Signal, WTF::SigInfo&, __darwin_arm_thread_state64&> 0x1090045f0> [16]
1 (16 bytes) ROOT LEAK: <WTF::Detail::CallableWrapper<JSC::Wasm::prepareFastMemory()::$_1::operator()() const::'lambda'(WTF::Signal, WTF::SigInfo&, __darwin_arm_thread_state64&), WTF::SignalAction, WTF::Signal, WTF::SigInfo&, __darwin_arm_thread_state64&> 0x109004600> [16]
Is it a bug? If it is not, how to properly finalize JavaScriptCore global context?
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